Portable tabletop



FIG. 1 is a top perspective view of a portable tabletop showing the new design;

FIG. 2 is a left side elevation view of the portable tabletop shown in FIG. 1;

FIG. 3 is a right side elevation view of the portable tabletop shown in FIG. 1;

FIG. 4 is a front elevation view of the portable tabletop shown in FIG. 1;

FIG. 5 is a rear elevation view of the portable tabletop shown in FIG. 1;

FIG. 6 is a top plan view of the portable tabletop shown in FIG. 1; and,

FIG. 7 is a bottom plan view of the portable tabletop shown in FIG. 1.

The broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a portable tabletop, as shown and described. 